fix specs publishing
fix specs publishing

We've been publishing to the wrong location, e.g. to
http://specs.openstack.org/sahara-specs/ instead of
http://specs.openstack.org/openstack/sahara-specs/

Fix argument to include the "openstack" part of the repo for spec
publishing.

Change-Id: I90c82ddd46f55784f06057d9768d7295f20f1264

openstack-infra/project-config,openstack-infra/project-config